net: Add support AX88796L ethernet device

AX88796L is device of NE2000 compatible.
This patch support AX88796L ethernet device.

Signed-off-by: Yusuke Goda <goda.yusuke@renesas.com>
Acked-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

2 files changed, 223 insertions, 0 deletions

diff --git a/drivers/net/ax88796.h b/drivers/net/ax88796.h
new file mode 100644
index 0000000..069ae80
--- /dev/null
+++ b/drivers/net/ax88796.h
@@ -0,0 +1,217 @@
+/*
+ * AX88796L(NE2000) support
+ *
+ * (c) 2007 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#ifndef __DRIVERS_AX88796L_H__
+#define __DRIVERS_AX88796L_H__
+
+#define DP_DATA     (0x10 << 1)
+#define START_PG    0x40    /* First page of TX buffer */
+#define START_PG2   0x48
+#define STOP_PG     0x80    /* Last page +1 of RX ring */
+#define TX_PAGES    12
+#define RX_START    (START_PG+TX_PAGES)
+#define RX_END      STOP_PG
+
+#define AX88796L_BASE_ADDRESS	CONFIG_DRIVER_NE2000_BASE
+#define AX88796L_BYTE_ACCESS    0x00001000
+#define AX88796L_OFFSET         0x00000400
+#define AX88796L_ADDRESS_BYTE   AX88796L_BASE_ADDRESS + \
+		AX88796L_BYTE_ACCESS + AX88796L_OFFSET
+#define AX88796L_REG_MEMR       AX88796L_ADDRESS_BYTE + (0x14<<1)
+#define AX88796L_REG_CR         AX88796L_ADDRESS_BYTE + (0x00<<1)
+
+#define AX88796L_CR		(*(vu_short *)(AX88796L_REG_CR))
+#define AX88796L_MEMR	(*(vu_short *)(AX88796L_REG_MEMR))
+
+#define EECS_HIGH		(AX88796L_MEMR |= 0x10)
+#define EECS_LOW		(AX88796L_MEMR &= 0xef)
+#define EECLK_HIGH		(AX88796L_MEMR |= 0x80)
+#define EECLK_LOW		(AX88796L_MEMR &= 0x7f)
+#define EEDI_HIGH		(AX88796L_MEMR |= 0x20)
+#define EEDI_LOW		(AX88796L_MEMR &= 0xdf)
+#define EEDO			((AX88796L_MEMR & 0x40)>>6)
+
+#define PAGE0_SET		(AX88796L_CR &= 0x3f)
+#define PAGE1_SET		(AX88796L_CR = (AX88796L_CR & 0x3f) | 0x40)
+
+#define BIT_DUMMY		0
+#define MAC_EEP_READ	1
+#define MAC_EEP_WRITE	2
+#define MAC_EEP_ERACE	3
+#define MAC_EEP_EWEN	4
+#define MAC_EEP_EWDS	5
+
+/* R7780MP Specific code */
+#if defined(CONFIG_R7780MP)
+#define ISA_OFFSET  0x1400
+#define DP_IN(_b_, _o_, _d_)  (_d_) = \
+	*( (vu_short *) ((_b_) + ((_o_) * 2) + ISA_OFFSET))
+#define DP_OUT(_b_, _o_, _d_) \
+	*((vu_short *)((_b_) + ((_o_) * 2) + ISA_OFFSET)) = (_d_)
+#define DP_IN_DATA(_b_, _d_)  (_d_) = *( (vu_short *) ((_b_) + ISA_OFFSET))
+#define DP_OUT_DATA(_b_, _d_) *( (vu_short *) ((_b_)+ISA_OFFSET)) = (_d_)
+#else
+/* Please change for your target boards */
+#define ISA_OFFSET  0x0000
+#define DP_IN(_b_, _o_, _d_)  (_d_) = *( (vu_short *)((_b_)+(_o_ )+ISA_OFFSET))
+#define DP_OUT(_b_, _o_, _d_) *((vu_short *)((_b_)+(_o_)+ISA_OFFSET)) = (_d_)
+#define DP_IN_DATA(_b_, _d_)  (_d_) = *( (vu_short *) ((_b_)+ISA_OFFSET))
+#define DP_OUT_DATA(_b_, _d_) *( (vu_short *) ((_b_)+ISA_OFFSET)) = (_d_)
+#endif
+
+
+/*
+ * Set 1 bit data
+ */
+static void ax88796_bitset(u32 bit)
+{
+	/* DATA1 */
+	if( bit )
+		EEDI_HIGH;
+	else
+		EEDI_LOW;
+
+	EECLK_LOW;
+	udelay(1000);
+	EECLK_HIGH;
+	udelay(1000);
+	EEDI_LOW;
+}
+
+/*
+ * Get 1 bit data
+ */
+static u8 ax88796_bitget(void)
+{
+	u8 bit;
+
+	EECLK_LOW;
+	udelay(1000);
+	/* DATA */
+	bit = EEDO;
+	EECLK_HIGH;
+	udelay(1000);
+
+	return bit;
+}
+
+/*
+ * Send COMMAND to EEPROM
+ */
+static void ax88796_eep_cmd(u8 cmd)
+{
+	ax88796_bitset(BIT_DUMMY);
+	switch(cmd){
+		case MAC_EEP_READ:
+			ax88796_bitset(1);
+			ax88796_bitset(1);
+			ax88796_bitset(0);
+			break;
+
+		case MAC_EEP_WRITE:
+			ax88796_bitset(1);
+			ax88796_bitset(0);
+			ax88796_bitset(1);
+			break;
+
+		case MAC_EEP_ERACE:
+			ax88796_bitset(1);
+			ax88796_bitset(1);
+			ax88796_bitset(1);
+			break;
+
+		case MAC_EEP_EWEN:
+			ax88796_bitset(1);
+			ax88796_bitset(0);
+			ax88796_bitset(0);
+			break;
+
+		case MAC_EEP_EWDS:
+			ax88796_bitset(1);
+			ax88796_bitset(0);
+			ax88796_bitset(0);
+			break;
+		default:
+			break;
+	}
+}
+
+static void ax88796_eep_setaddr(u16 addr)
+{
+	int i ;
+	for( i = 7 ; i >= 0 ; i-- )
+		ax88796_bitset(addr & (1 << i));
+}
+
+/*
+ * Get data from EEPROM
+ */
+static u16 ax88796_eep_getdata(void)
+{
+	ushort data = 0;
+	int i;
+
+	ax88796_bitget();	/* DUMMY */
+	for( i = 0 ; i < 16 ; i++ ){
+		data <<= 1;
+		data |= ax88796_bitget();
+	}
+	return data;
+}
+
+static void ax88796_mac_read(u8 *buff)
+{
+	int i ;
+	u16 data, addr = 0;
+
+	for( i = 0 ; i < 3; i++ )
+	{
+		EECS_HIGH;
+		EEDI_LOW;
+		udelay(1000);
+		/* READ COMMAND */
+		ax88796_eep_cmd(MAC_EEP_READ);
+		/* ADDRESS */
+		ax88796_eep_setaddr(addr++);
+		/* GET DATA */
+		data = ax88796_eep_getdata();
+		*buff++ = (uchar)(data & 0xff);
+		*buff++ = (uchar)((data >> 8) & 0xff);
+		EECLK_LOW;
+		EEDI_LOW;
+		EECS_LOW;
+	}
+}
+
+int get_prom(u8* mac_addr)
+{
+	u8 prom[32];
+	int i;
+
+	ax88796_mac_read(prom);
+	for (i = 0; i < 6; i++){
+		mac_addr[i] = prom[i];
+	}
+	return 1;
+}
+
+#endif /* __DRIVERS_AX88796L_H__ */
diff --git a/drivers/net/ne2000.c b/drivers/net/ne2000.c
index 36ea35b..abf910c 100644
--- a/drivers/net/ne2000.c
+++ b/drivers/net/ne2000.c
@@ -112,8 +112,13 @@ void uboot_push_tx_done(int key, int val);
 /* NE2000 base header file */
 #include "ne2000_base.h"
 
+#if defined(CONFIG_DRIVER_AX88796L)
+/* AX88796L support */
+#include "ax88796.h"
+#else
 /* Basic NE2000 chip support */
 #include "ne2000.h"
+#endif
 
 static dp83902a_priv_data_t nic; /* just one instance of the card supported */
 
@@ -131,6 +136,7 @@ dp83902a_init(void)
 	DEBUG_LINE();
 
 #if defined(NE2000_BASIC_INIT)
+	/* AX88796L doesn't need */
 	/* Prepare ESA */
 	DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE1);  /* Select page 1 */
 	/* Use the address from the serial EEPROM */